ES1988 Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – PCI Audio-Modem Accelerator Product Brief

ESS Technology, Inc.
ES1988 Allegro™
PCI Audio-Modem Accelerator
Product Brief
DESCRIPTION
The ES1988 Allegro™ PCI audio-modem accelerator combines
advanced audio and modem functionality in a highly integrated
PCI solution. Utilizing one PCI load, the ES1988 provides a two-
chip audio-modem solution with digital interface capability to an
AC‘97 codec in the dock (a.k.a. digital docking). The ES1988 is
designed to provide a low-cost, high-performance solution for
notebook PC applications.
The high-bandwidth PCI bus and an integrated high-fidelity
codec are utilized to deliver advanced PC audio features, such
as DirectSound™ acceleration and HRTF 3D positional audio.
The ES1988 implements multistream DirectSound and
DirectSound3D acceleration with digital mixing, sample rate
conversion, and HRTF 3D filtering for two-speaker 3D positional
audio.
The programmable audio signal processor provides support for
multiple audio streams. With its built-in DSP core, the ES1988
uses its dedicated direct memory access (DMA) engine to handle
complex signal processing tasks with a bus-mastering PCI
interface. The support functions ensure efficient transfer of audio
data streams to and from system memory buffers, providing a
system solution with maximum performance and minimal host
CPU loading. The architecture enables implementation of
communications over the Internet from multiple sources.
The ES1988 maintains full DOS legacy audio compatibility over
the standard PCI 2.1 and PCI 2.2 bus. Full DOS game
compatibility is ensured through either PC/PCI, distributed DMA
(DDMA), or transparent DMA (TDMA).
The ES1988 includes an HSP modem interface via its secondary
AC-Link connecting with the ES2828 MC‘97 codec. The MC‘97
is used as the analog front end for the modem and DAA control.
The V.90 modem runs on the host while the ES1988 serves as
the bidirectional buffer for data transmission and reception. The
modem functions include the standard AT command set, V.42bis
and Group 3 fax.
The ES1988 provides a high-quality docking solution through
proven AC-link-based digital docking. This is accomplished by
using only a five-wire digital connection. The secondary AC‘97
link (extension 2.1 compliant) of the ES1988 interfaces to a
secondary AC‘97 codec in the dock to provide high-quality audio
in the dock.
The ES1988, which operates at 3.3V digitally and 5.0V in analog,
is compliant with the Advanced Power Management (APM) 1.2,
Advanced Configuration and Power Interface (ACPI) 1.0, and
PCI Power Management Interface (PPMI) 1.0. The ES1988
supports D0, D1, D2, and D3 (hot and cold) power-saving modes
for power efficiency when the audio system is both active and
idle. CLKRUN# support is also available.
The ES1988 is available in an industry-standard 100-pin low-
profile quad flat pack (LQFP) package.
AUDIO FEATURES
• High-performance single-chip PCI audio acceleration
• Integrated high-fidelity AC‘97 codec
• Multistream DirectSound and DirectSound 3D acceleration
• Sensaura® CRL positional 3D
• High-quality sample rate conversion and digital mixing
• Direct music support
• Realtime effects processing
• S/PDIF output for PCM or AC-3 content
• Full legacy DOS game support, using TDMA, PC/PCI, or DDMA
hardware implementation methods
• Supports one additional PCI bus master devices
• HSP modem interface via MC‘97 link
• Digital docking via secondary AC-Link
MODEM FEATURES
• Data mode capabilities:
—– V.90 56 kbps
—– V.34 33.6 kbps and fallbacks
—– Standard AT command set
—– V.42 (LAPM) and MNP error correction
—– V.42bis/MNP 5 data compression
—– 3.3V power supply with 5V-tolerant inputs
• Fax mode capabilities:
—– ITU-T V.17, V.21 ch2, V.27ter, V.29
—– Group 3 (TIA/EIA 578 Class 1 and Class 2)
• Supports wake-on-ring from D3_hot and D3_cold states
POWER MANAGEMENT
• Compliance with APM 1.2, ACPI 1.0, and PPMI 1.1
• Compliance with Intel’s Mobile Power Guidelines ‘99
• 3.3V digital operation with 5V-tolerant inputs
• 5.0V analog operation
COMPATIBILITY
• Supports PC DOS games and applications for Sound Blaster™
and SoundBlaster Pro™
• Meets PC99 /PC2001and WHQL specifications
• Compliant with Intel’s audio-modem riser card and mini-PCI
specifications
ESS Technology, Inc.
SAM0368-030601
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